<!DOCTYPE html>
<html lang="en">
<head>
    <title>Title</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
</head>
<body>
<form action="/login" method="post">
    用户名 <input type="text" name="username">
    密码 <input type="text" name="password">
    <input type="submit" value="登录">
</form>
</body>
</html>